Electric-lamp socket.



F. E. SEELBY. ELECTRIC LAMP SOCKET.

APPLICATION FILED APRA, 1910.

@amm not, 2 4, 1911.

entran s'rnras rnrnnfr onirica.

FRANK E. SEELEY, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE BRYANTELEC-- TRIO COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OFCONNECTICUT.

ELECTRIC-LAMP SOCKET.

i ponsen.1

Specification of Letters Patent.

Patented Oct. 24, 1911.

Application led April 4, 1910. Serial No. 553,266.

TC all whom it may concern:

Be it known that I, FRANK E. Snnnnr, a citizen of the United States ofAmerica, residing in the city of Bridgeport, in the county of Fairfield,in the State of Connecticut, have invented certain new and usefulImprovements in Electric-Lamp Sockets, of which the following is aspecification.

The main object of my invention is to construct an efficientA electriclamp socket with a switch mechanism which'will give a quadruple break ofthe circuit on turning the key to sluit off the current, that is, therewill be a double breal 'si the circuit in each of the two poles orbranches.

A further feature of my invention consists in so constructing the socketthat at the same time the key spindle will be dead that is, not includedin the electric circuit.

In the accompanying drawings Figure 1 is a vertical section through asocket einbodying my invention, the line of section being on the axis ofthe spindle, and the switch in this viewvbeing shown in the closedposition; Fig. 2 is a similar view, showing the switch open; Fig. 3 is aplan view of the lower porcelain block, the upper block having beenremoved and the parts being in the positions shown in Fig. 2; Fig. 4 i'sa section on the line 4-4, Fig. 3; Fig. 5 is a section on the line 5h53,Fig. 3; Fig. 6 is a perspective view.

I prefer -to construct the insulating body of the socket of two blocksand 1l, united together by brackets 12 and 13, which are -inelosed inrecesses in the juxtaposed faces of the blocks and carry binding screws14, 15 for the conductor wires, while the lamp terminals (centralcontact 16, screw shell 17) are moundoisV `the underside of the block,all substantially as set forth in the lerkins socket patent 626,927. Asin said patent, I may use as a part of my switch mechanism, a keyspindle 18 with handle 19, and turning in bearings in a metal fra-me 20Figs. 1, 2 and 3), and Within the frame is a cam block 21, having a lostmotion connection with the key spindle; `this cam block acts upon aplate 22, guided on the frame .and normally pressed upward against thecam block by a spiral spring 23 (Fins. 1 and 2) around the frame 2O in acentra well in the lower block 11. In this socket, however, the camperforms only the mechanical function of actuating the plate 22 againstthe pressure of the spring 23, and forms no part of the electricalcircuit, so that the key spindle 18 is dead.

To the plate 22 is secured in any suitable way. a switch plate 24,consisting in the present instance of a plate of hard ber or otherinsulating material having secured to its upper edge two conductingstrips 25 and 26, (Figs. 3, 5 and 6), extendingidownwardly a shortdistance on opposite faces of the insulating strip. In the presentinstance I have shown this switch plate 24 as secured to a projectingarm 27 on the plate 22, Fig. 6, by passing said arm into 'an openingformed in the insulating body of the plate 24, so that the latter willrise and fall with the plate 22 as actuated by the spring 23 and cam 21.

The juxtaposed faces of the two blocks are recessed to form aA chamber28, in which the switch blade may reciprocate. The recesses in which thewire terminal brackets 12 and 13 are housed open into the opposite endsof this chamber 28, F ig. 3. In electrical connection with the terminalbracket 12 is a spring contact 30,whose free. end reaches over into thechamber 28, in position to make contact with the plate 26 on the side ofthe switch plate 24, next the cam 21, when the latter has been turned todepress the switch plate as shown in. Fig. 1. Similarly vthere isconnected with the terminal bracket 13 a spring contact 31 to makecontact with the conducting plate 25 on the switch plate. ln the samechamber 28, but on the opposite side of the switch plate 24 from thecontacts 30 and 31 aretwo contacts 32 and 33, corresponding with, butspaced from the contacts 30 and 31. The contact 32 is in electricalconnection with the central contact 16, while the contact is inelectrical connection with the screw shell 17, Figs. 5 and 6'. The upperfree ends of the plates 32 and 33 are inpositions to contact with theplates 26 and 25 respectively, when the switch plate is depressed, toclose the circuit. When the key spindle 18 is turned toward the positionshown in Fig. 2 from the closed circuitposition, Fig. 1, the spring 23will cause the I switch blade 2e to be raised with a `quick movementandiwill cause the circuit to be broken at four points, namely, at theplate 2G on one side with the contact 30 and on the other side with thecontact 32, and at the same time at plate 25 on one side with plate l*and on tlm other side with plaie 33, Figs. 4. and f5. "Jillian heCircuit is illus broken he insulating body of lah@ switch pluie #mullsl'lotwceu lh@ Con'lucs 30 und 3l. on one fido. mul the conflicts 2.2:incl 33 on the ulhci.

l. claim as my inaf'iltimill. im elriic lumplsoclie, Comprising :inlnsiiluiisg hoaly with n Swih chumbei' und with wim lmn'xinals :md lamplmfmiuals,two spaced co'iilacls in. @zich brunch 0f the cirmit, in lhswitch chandler, n, movable :witch plaie carrying Contacts 011 itsOppoiic laces und a key spindle and a spi-ing to Giunte said switchplate t0 make nml break he circuit al both said xpm-uil Contncls 011aL-h brunch. v

An oliciiic' lump soc-laut, comprising :m insuln'iingf bmly with uswitch Cl'mnlhei' 21ml. with wir@ 'lm'miuulg uml lamp ;c1111.inuls,l;wosawmill contacts; in auch luuiichol thetircuit in lille fawllchuhzunlmz, au insulating swlllch alla Czlrifying Contacts mi its oppofaces,

:i plato. supporting Jche insulating switch plaie, and :'L hoy spindle,cam and a spring lo nehmt@ the suppru'tng plate..

All electric. lump socket, comprising an insulating body with :L switchchamber and with lump terminals, wir@ terminal brackci's in ,lfoccgscs:1t the opposite slides of the insulating body, Contacts in connectionwith lha i'cspcclve bi'zlckcts, corresponding but ,Sp-:10ml contacts inconnection with the lamp Terminale, :i switch plate having contacts onits oppwltc faces to make and break the circuit in hull) l) anchos und:i key spindle, Cam

-:unl spring 'to actu-.itc the switch plate.

,lil csl'iinnny whereof l have signed my name lo this spvciiication, 1nthe presence of two Subscribing witnesses.

l? -ANK E. SEELE.

lVi messes A. H. JONES,

L. 3. WHEELER.

